The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 1999
Filed:
Feb. 19, 1997
Tsutomu Matsui, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical recording medium is provided, this medium having a first substrate, onto the surface of which is formed a phase-change recording layer, and a second substrate, onto the surface of which is formed a magneto-optical recording layer, these layers being adhered to one another in a manner that causes their surface to be mutually opposing. By providing a means for selectively collecting laser light onto the phase-change recording layer and onto the magneto-optical recording layer, and selecting the output of either a differential amplifier or amplifier, to which are input the received-light outputs from light reflected from the optical recording medium, it is possible to perform access of both the phase-change recording layer and the magneto-optical recording layer, and to perform both recording and playbacking of information at high speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile